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Ultrafast cooling device for wire and rod hot rolling production line

An ultra-fast cooling and production line technology, which is applied in the field of cooling devices for continuous processing of strips or wires, can solve the problems that the cooling device cannot be satisfied and cannot be implemented in the manufacturer, achieves huge social and economic benefits, and is convenient for maintenance. , the effect of short cooling time

Inactive Publication Date: 2006-01-11
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing cooling device matched with the hot rolling production line cannot meet the requirements of this new process
As a result, the new ultra-rapid cooling process for high-strength ribbed steel bars after rolling is still unable to be implemented in manufacturers

Method used

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  • Ultrafast cooling device for wire and rod hot rolling production line
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  • Ultrafast cooling device for wire and rod hot rolling production line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: HRB335 ribbed steel bar of Φ12mm produced by three-wire split rolling

[0032]According to the heat treatment process requirements of steel bars, the entire cooling device is determined to be composed of three sets of parallel cooler boxes, and three forward coolers and one reverse sprinkler are arranged in series in the box. The inner diameter of the cooler and the sprinkler is Φ36mm, and the length of each cooler is 1.2 meters; the length of the sprinkler is 0.4 meters; the distance between the two boxes is 0.2 meters, and the length of the entire cooler device is about 12.8 meters. The water supply system of each cooler and water catcher in the cooling device is controlled by high-pressure water valves that are individually opened and closed, and they can be adjusted and opened and closed individually according to process requirements.

[0033] Trial production of Φ12mm HRB335 ribbed steel bars with the ultra-rapid cooling device of the present invention i...

Embodiment 2

[0037] Embodiment 2 adopts the ribbed steel bar of the RHB400 of Φ 25mm to be produced by single wire rolling

[0038] According to the technical requirements of the heat treatment of the above-mentioned steel bars, a cooling device consisting of a group of cooler boxes is adopted, which is divided into four sections, and each section is composed of two coolers and a reverse water splasher connected in series. The inner diameter of the cooler and the splasher is Φ48mm. Each cooler is 1.2m long, the sprinkler is 0.4m long, the distance between the two boxes is 0.2m, and the overall length is about 12.8m. Each cooler and reverse sprinkler can be opened and closed independently and the water pressure can be adjusted.

[0039] When producing Φ25mm HRB400 ribbed steel bars, 14 full continuous rolling mills are used, including 6 rough rolling mills, 6 intermediate rolling mills, and 2 finishing mills. Each mill rolls 1 pass, and the billet is 150mm billet The material is 20MnSi st...

Embodiment 3

[0043] Example 3 The HRB500 ribbed steel bar of Φ16mm is produced by double-strand rolling

[0044] According to the requirements of the above steel heat treatment process, combined with the actual situation of the production workshop, the entire cooling device is determined to be composed of two sets of parallel cooler boxes, and each set of cooler boxes is composed of three sections. In the first section, three coolers and a water thrower are connected in series in sequence; in the second and third sections, two coolers are connected in series in forward direction and a reverse water thrower is connected in series. The inner diameter of the cooler and the sprinkler is Φ36mm, the length of each cooler is 1 meter, the length of the sprinkler is 0.4 meters, the distance between the two boxes is 0.4 meters, and the total length is about 9.5 meters. Each cooler and sprinkler can be opened and closed independently, and the pressure of its water flow or air flow can also be adjuste...

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Abstract

An ultrahigh-speed cooling system for the hot-rolling line of wire and rod materials is composed of at least one cooler consisting of main body, inlet horn pipe, outlet guide pipe and the sleeve pipe of guide pipe, at least one main valve, at least one water trunk, high-pressure water pump, the bench with at least one pair of castors, casing of cooler, and reverse water barrier for preventing the splashing of high-pressure water.

Description

technical field [0001] The invention belongs to the technical field of devices for continuously processing strips or wires by cooling, and proposes an ultra-rapid cooling device for a wire and bar hot rolling production line. Background technique [0002] Metal technology includes three basic components, smelting - to obtain a certain composition of metal; processing - to obtain a product with a certain external shape; heat treatment - through which the metal can obtain a certain internal microstructure to achieve the required performance indicators. Any kind of heat treatment is to make the internal microstructure of the metal undergo the desired change by heating the metal to a certain temperature and subsequent cooling. [0003] Hot-rolled low-carbon steel or low-alloy steel wire or rod is usually heat-treated by quenching or low-temperature tempering. In order to improve the tensile strength and strength-to-yield ratio of wire rods and rods, and considering their plasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/06
Inventor 赵宪明吴迪王国栋刘相华杜林秀
Owner NORTHEASTERN UNIV
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